A DC application profile (DCAP) specifies set of terms used in a class of DC metadata description sets, typically the class of description sets which are deployed within a metadata application or within a set of applications and services operating within some domain or community. It describes the properties that are used in statements and how the use of those properties is constrained or adapted for the purposes of that application or domain. (Excerpt from <a href="http://www.ukoln.ac.uk/metadata/dcmi/collection-application-profile/">this source</a>)

The Simple Dublin Core Metadata Element Set (DCMES) consists of 15 metadata elements. Each Dublin Core element is optional and may be repeated. The DCMI has established standard ways to refine elements and encourage the use of encoding and vocabulary schemes. There is no prescribed order in Dublin Core for presenting or using the elements. (Excerpt from <a href="http://en.wikipedia.org/wiki/Dublin_core">Wikipedia article: Dublin Core Metadata Element Set (DCMES) </a>)

The Dublin Core Metadata Initiative (DCMI) incorporated as an independent entity (separating from OCLC) in 2008 that provides an open forum for the development of interoperable online metadata standards for a broad range of purposes and of business models. DCMI's activities include consensus-driven working groups, global conferences and workshops, standards liaison, and educational efforts to promote widespread acceptance of metadata standards and practices. (Excerpt from <a href="http://en.wikipedia.org/wiki/DCMI">Wikipedia article: Dublin Core Metadata Initiative</a>)

The Dewey Decimal Classification (DDC, also called the Dewey Decimal System) is a proprietary system of library classification developed by Melvil Dewey in 1876. It has been greatly modified and expanded through 22 major revisions, the most recent in 2003. This system organizes books on library shelves in a specific and repeatable order that makes it easy to find any book and return it to its proper place. The system is used in 200,000 libraries in at least 135 countries. A designation such as Dewey 16 refers to the 16th edition of the DDC. (Excerpt from <a href="http://en.wikipedia.org/wiki/Dewey_decimal">Wikipedia article: Dewey Decimal</a>)

The Dewey Decimal Classification (DDC, also called the Dewey Decimal System) is a proprietary system of library classification developed by Melvil Dewey in 1876. It has been greatly modified and expanded through 22 major revisions, the most recent in 2003. This system organizes books on library shelves in a specific and repeatable order that makes it easy to find any book and return it to its proper place. The system is used in 200,000 libraries in at least 135 countries. A designation such as Dewey 16 refers to the 16th edition of the DDC. (Excerpt from <a href="http://en.wikipedia.org/wiki/Dewey_decimal">Wikipedia article: Dewey Decimal</a>)

Dexy is a tool for writing documents which relate to code. This might mean software documentation, journal articles relating to computational research, a code tutorial on your blog, writing up computer science class assignments, pretty much anything. You can think of Dexy as a very fancy 'make' tool with lots of document-related features and powerful filters. Dexy is open source, licensed under the MIT license. (Excerpt from <a href="http://www.dexy.it/intro/">this source</a>)

Dynamic HTML, or DHTML, is an umbrella term for a collection of technologies used together to create interactive and animated web sites by using a combination of a static markup language (such as HTML), a client-side scripting language (such as JavaScript), a presentation definition language (such as CSS), and the Document Object Model. DHTML allows scripting languages to change variables in a web page's definition language, which in turn affects the look and function of otherwise "static" HTML page content, after the page has been fully loaded and during the viewing process. Thus the dynamic characteristic of DHTML is the way it functions while a page is viewed, not in its ability to generate a unique page with each page load. By contrast, a dynamic web page is a broader concept &dash; any web page generated differently for each user, load occurrence, or specific variable values. This includes pages created by client-side scripting, and ones created by server-side scripting (such as PHP, Perl, JSP or ASP.NET) where the web server generates content before sending it to the client. (Excerpt from <a href="http://en.wikipedia.org/wiki/Dynamic_HTML">Wikipedia article: DHTML</a>)

An archive refers to a collection of historical records, as well as the physical place they are located. Archives contain primary source documents that have accumulated over the course of an individual or organization's lifetime, and are kept to show the function of an organization. (Excerpt from <a href="http://en.wikipedia.org/wiki/Digital_archive">Wikipedia article: Archive</a>)